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Table 1 Characteristics of the antimicrobial prescriptions in 5650 older adults prior to (minimum 2 days) an isolation of Escherichia coli (n = 7379) from a urine sample as retrieved from 15 voluntary participating Belgian clinical laboratories (January 2005 – December 2005)

From: Characteristics of the antibiotic regimen that affect antimicrobial resistance in urinary pathogens

Variable Men (1551 isolates) Women (5846 isolates)
Median IQR Median IQR
Time 24 [10–79] 41 [13–125]
DDD 27.8 [10.3–64.1] 23 [9.5–53.0]
N_prescriptions 4 [2–6] 3 [2–6]
%Injectable 25 [0–57] 11 [0–50]
ARI E. coli 0.17 [0–0.35] 0.13 [0–0.31]
  1. IQR: interquartile range Time: time in days between sampling and start of preceding antimicrobial (antibiotic) prescription. DDD: sum of defined daily dose (DDD) prior to sampling. N_prescriptions: number of prescriptions (If the same antimicrobial formulation (substance) was delivered within 7 days this was defined as one prescription). %Injectable: route of administration (modeled as the ratio of preceding injectable over preceding orally administered antimicrobial prescriptions, i.e. the proportion of preceding parenteral prescriptions). ARI: Antimicrobial Resistance Index calculated as proportion of non-susceptible antimicrobial resistance test results as defined by Kirby Bauer disk diffusion test